Tyvek® 400 Coverall, Serged Seams, Attached Hood, Elastic Waist, Elastic Wrists and Ankles, Front Zip, Storm Flap, White, 3XL ORS NASCO Color coded for gas service to Color coded for gas service to provide added safety Internal check valves designed to prevent reverse flow and accidental mixing of oxygen and fuel gases Torch and regulator models provide downstream and upstream protection 10 in maximum cutting capacity For stopping flashbacks by preventing ignition of mixed gases and to protect equipment such as hoses biodegradable detergents that form a powerful high density polyethylene which creates a unique no films or laminates to abrade or wear away Comfort fit design enables a greater range of movement while stretching and bending with reinforcement in high stress areas Available in many different styles